The far-infrared structure of the luminous interacting galaxy Arp 299

Journal Article · Sat Apr 01 04:00:00 EST 1989 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/167280· OSTI ID:5841788

Joy, M; Telesco, C M; Decher, R; Lester, D F; Harvey, P M; Rickard, L J; Bushouse, H

The strongly interacting galaxies NGC 3690 and IC 694 (or Arp 299) exhibit extensive star formation, a large infrared luminosity, and possible nuclear activity. To determine the origin of the infrared luminosity in this system, high-resolution far-infrared profiles have been obtained in which two distinct sources can clearly be discerned; these observations reveal that 60 percent of the far-infrared luminosity comes from an unresolved source in the center of IC 694, with the remaining 40 percent originating in a compact source in NGC 3690. A new high-resolution 20-micron image of the Arp 299 system is compared with the far-infrared profiles, revealing that NGC 3690 is substantially hotter than IC 694 in the thermal infrared; the observed temperature gradient is opposite to that which is expected if the putative active nucleus in IC 694 generates a significant fraction of the total luminosity. 28 refs.

• Research Organization: NASA, Marshall Space Flight Center, Huntsville, AL (USA); Texas Univ., Austin (USA); Naval Research Laboratory, Washington, DC (USA); NASA, Ames Research Center, Moffett Field, CA (USA)
• OSTI ID: 5841788
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 339; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BASIC INTERACTIONS
ELECTROMAGNETIC RADIATION
ENERGY SPECTRA
FAR INFRARED RADIATION
GALACTIC EVOLUTION
GALAXIES
GALAXY NUCLEI
GRAVITATIONAL INTERACTIONS
INFRARED RADIATION
INTERACTIONS
LUMINOSITY
MORPHOLOGY
OPTICAL PROPERTIES
ORIGIN
PHYSICAL PROPERTIES
RADIATIONS
SATELLITES
SIGNAL-TO-NOISE RATIO
SPECTRA
TEMPERATURE GRADIENTS